Trait rustc_mir_dataflow::AnalysisDomain

pub trait AnalysisDomain<'tcx> {
    type Domain: Clone + JoinSemiLattice;
    type Direction: Direction = Forward;

    const NAME: &'static str;

    fn bottom_value(&self, body: &Body<'tcx>) -> Self::Domain;
    fn initialize_start_block(&self, body: &Body<'tcx>, state: &mut Self::Domain);
}

Defines the domain of a dataflow problem.

This trait specifies the lattice on which this analysis operates (the domain) as well as its initial value at the entry point of each basic block.

Required Associated Types

type Domain: Clone + JoinSemiLattice

The type that holds the dataflow state at any given point in the program.

Provided Associated Types

type Direction: Direction = Forward

The direction of this analysis. Either Forward or Backward.

Required Associated Constants

const NAME: &'static str

A descriptive name for this analysis. Used only for debugging.

This name should be brief and contain no spaces, periods or other characters that are not suitable as part of a filename.

Required Methods

fn bottom_value(&self, body: &Body<'tcx>) -> Self::Domain

Returns the initial value of the dataflow state upon entry to each basic block.

fn initialize_start_block(&self, body: &Body<'tcx>, state: &mut Self::Domain)

Mutates the initial value of the dataflow state upon entry to the START_BLOCK.

For backward analyses, initial state (besides the bottom value) is not yet supported. Trying to mutate the initial state will result in a panic.

Implementors

impl<'a, 'tcx> AnalysisDomain<'tcx> for MaybeTransitiveLiveLocals<'a>

type Domain = ChunkedBitSet<Local>

type Direction = Backward

const NAME: &'static str = "transitive liveness"

impl<'a, 'tcx> AnalysisDomain<'tcx> for DefinitelyInitializedPlaces<'a, 'tcx>

type Domain = Dual<BitSet<MovePathIndex>>

const NAME: &'static str = "definite_init"

impl<'mir, 'tcx> AnalysisDomain<'tcx> for MaybeRequiresStorage<'mir, 'tcx>

type Domain = BitSet<Local>

const NAME: &'static str = "requires_storage"

impl<'tcx> AnalysisDomain<'tcx> for MaybeBorrowedLocals

type Domain = BitSet<Local>

const NAME: &'static str = "maybe_borrowed_locals"

impl<'tcx> AnalysisDomain<'tcx> for MaybeInitializedLocals

type Domain = BitSet<Local>

const NAME: &'static str = "maybe_init_locals"

impl<'tcx> AnalysisDomain<'tcx> for MaybeLiveLocals

type Domain = ChunkedBitSet<Local>

type Direction = Backward

const NAME: &'static str = "liveness"

impl<'tcx> AnalysisDomain<'tcx> for MaybeStorageLive

type Domain = BitSet<Local>

const NAME: &'static str = "maybe_storage_live"

impl<'tcx> AnalysisDomain<'tcx> for EverInitializedPlaces<'_, 'tcx>

type Domain = ChunkedBitSet<InitIndex>

const NAME: &'static str = "ever_init"

impl<'tcx> AnalysisDomain<'tcx> for MaybeInitializedPlaces<'_, 'tcx>

type Domain = ChunkedBitSet<MovePathIndex>

const NAME: &'static str = "maybe_init"

impl<'tcx> AnalysisDomain<'tcx> for MaybeUninitializedPlaces<'_, 'tcx>

type Domain = ChunkedBitSet<MovePathIndex>

const NAME: &'static str = "maybe_uninit"